Apparatus for feeding paper sheets



Nov; 15, 1927. 1,649,401

J. GIESECKE ET AL APPARATUS FOR FEEDING PAPER SHEETS Filed April 5, 1927 2 Sheets-Sheet 1 Ira Z1791: y /M 52a 4 Nov. 15, 192.7

J GIESECKE ET AL APPARATUS FOR FEEDING PAPER SHEETS Filed April 5. 1927 /(TWC..

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2 Sheets-Sheet 2 SQWM Patented Nov. 15, 1927.

UNITED STATES PATENT OFFICE.

JULIUS GIESEGKE AND HERMANN GIESECKE, OF LEIPZIG-LEUTZSCH, GERMANY.

APPARATUS 1 0B FEEDING PAPER SHEETS.

Application filed April 5, 1927, Serial No. 181,067, and in Germany January 15, 1926.

This invention relates to an apparatus for feeding paper sheets, of that type in which a plurality of endless rolluided conveyor ribbons are arranged in superposed fashion, and it consists in that the single conveyor ribbons form inclined planes by the employment'of roll pairs of different diameter, while the paper sheets thereon are supplied from one conveyor ribbon to, the next one and thereby turned over several times, the I conveyor ribbons being'commonly moved by an endless'chain insuch a way that-the conveyor. ribbon parts in contact with one another are equi-directed and of equal speed. Beneath the upper part of the upper conveyor ribbon, and beneath the upper part of the lower conveyor ribbon, as well as between the upper part of the upper conveyor ribbon and the suction-rod of the suction contrivance, a table plate is arranged. The

. suction-rod is driven by means of c0g-wheel lateral frame parts 1 having angular slots 2 therein in which engagethe trunnions of the suction-rod 3 of the suction contrivance. The driving-levers 41 of the latter are fulcrumed 011 bolts 5 and joined to the suctionrod 3 by means of links 6.. On the ends of the driving-shaft 7 for the suction-rod move-- ment, cog-wheel sectors 8 are keyed, of which the teeth are adapted to coact with cogwheel sectors 9 keyed on a shaft'lO. Crankpins 11 fixed on the cog-wheel sectors 9 are connected by rods 12, with the levers 4.

During the rotation of the cog-wheel sectors, one tooth of the cog-wheel sectors 8 strikes against one tooth of the cog-wheel sectors 9 whereby the latter receive a partial movement and are then stopped until they are moved farther by the next tooth of the cogwheel sectors 8. By a suitable determination of the width of the teeth and choice of the number of the latter, it is possible to ex- The advance of the ratchet-wheel The improvedapparatus comprises two.

actl'y determine the periods for the movements and for the stoppings of the levers 4.

thus particularly adapted for use in connection with high-speed machines, for instance rubber printing machines; ,Both ends of the drlving-shaft 7 are fu'r ther fitted with discs 13 having crank-pins 14 attached to the connection-rods of the air pumps. 1

V In the two lateral frame parts 1, further, a roll. 16 is revolubly mounted and connected by an endless conveyor ribbon 17 with a roll 18of smaller diameter, of which the shaft 31 is also revolubly mounted in the frame parts 1. Below the upper part of the con veyor ribbon 17 a table plate 19 is fixed so as to extend between the two rolls 16 and 18-, said table plate having a metal extension 20 projecting to the bar 21 over which the paper sheet is brought by the suction-rod 3 to the conveyor roll 23 by which the paper sheet 1 is further conveyed.

In the frame parts 1, further, rolls 2st and 25 'of'different diameters are revolubly mounted, which are connected by a second conveyor ribbon 26 and so arranged that the lower part ofthe conveyor ribbon 17 runs parallel to'the upper part of the conveyor ribbon 26. bon 26 runs a third conveyor ribbon '27 located. around rolls. 28 and 29 of different diameters revolubly mounted in the frame parts 1. The conveyor ribbon 27 has a position declined to the right. upper part of the conveyor ribbon 27 a table plate 30 is fixed. The paper sheets are placed on the table plate 30 in weakly straightened condition and are during their conveyance over the multiple rolls further Below the conveyor rib- I Beneath i the straightened, so that the table plate 30 need 1 not be solong as with paper sheet feeding apparat'uso-f known types. The three conveyor ribbons 17, 26, 27 are driven from llO in clockwise direction, while the trunnions of the rolls 18 and 28 rotate in counterclockwise direction. To this end, the chain is led over a loose chain-wheel that is adjustably mounted for attaining the required tension of the chain.

The paper sheets placed in straightened condition on the table plate are caused to travel along with the upper part of the conveyor ribbon 27 until they come in contact with the second conveyor ribbon 26 by which they are further conveyed while running between the equi-directed parts of the conveyor ribbons 26 and 17 to the roll 16 where they travel upon the upper part of the conveyor ribbon 17 and pass onto the table plates 19 and 20. The paper sheets arrive thus at the suction contrivance in the same position as they are placed on the table plate 30 below. The lifting of the paper sheets is effected from above. The conveyor ribbons conveying the paper sheet piles are, at the places where they are almost in contact with one another, equidirected and adapted to yield corresponding to the thickness of the piles. The rolls 16 and 25 are embraced by guiding rakes 38 and 39 adjustably mounted on bolts 37 and adapted to press the paper sheets upon the rolls.

The apparatus is fitted with a contact device of known type. The contact bars 40 are keyed on an aXle 41, on which a lever 43 carrying a roller 42 as well as a lever 44 are fixed. The lifting of the roller 42 and thus of the contact bars 40 is effected, like that of the suction-rod 8, by means of the cam-disc 13.

The lever 44 is pivotally connected with a rod 45 (Figs. 4 and 5) of which the other end is connected with the short arm of a knee-lever 46, which is turnable on the bolt 47 and of which the long arm has an elongated slot 53. This slot is engaged by a pin 54 mounted on a slidable square rod 55 of which one end carries a plate 56. An anle 48 (Figs. 1, 5 to 7) carries a ratchet wheel 49 and a loosely turnable pawl-lever 57 on which a pawl 22 is slidably located and held by a springy bolt 58 of which the pointed end engages in one of the two notches 59 in the pawl 22. The latter carries further a pin 60. The reciprocation of the pawllever 57 can, for instance, be effected by the reciprocating driving-lever 4 (Fig. 1) which by a connection-rod is connected with a downwardly directed arm (not illustrated) of the pawl-lever 57. Or, the driving-lever 4 may be extended in upward direction and connected by a connection-rod with the pawllever 57 shown, or any other construction of known type may be provided for the reciprocation of the pawl-lever 57.

When removing the pile of paper sheets lying on the table plates 19, 20, also the contact bars 40 drop, whereby the lever 44 is lifted and the knee-lever 46 turns in the direction of arrow (Fig. 4). Thereby, also the square rod 55 is displaced in the direction of arrow and the plate 56 is moved into the teeth of the ratchet-wheel 49by the incline of a stationary plate 61 provided for this purpose. The pawl 22 remains then under the influence of the springy bolt 58in the upperv position and slips freely over the ratchet-wheel 49 if the plate 56 is retracted.

The axle48 of the ratchet-wheel 49 carries a toothed wheel 50 meshing with a spur wheel 51 on the shaft 31. The advance of the ratchet-wheel 49 is transmitted by the toothed gearing 50, 51 to the shaft 31. By

the rotation of the latter and by means of the endless chain, the rolls 32, 28, 25 and thus the conveyor ribbons are moved corresponding to the removal of the paper sheets from the apparatus. 5

The shaft 52 of the roll 29 may be fitted with a hand crank in order to bring at the beginning of the operation the paper sheets onto the suction contrivance by a corresponding initial movement of the conveyor ribbons 27, 26, 17. I

The operation of the apparatus is briefly as follows: The paper sheets laid in straightened condition upon the lower table plate 30 are conveyed by means of the conveying ribbons 27, 26, 17 onto the upper tableplates 19 and 20, lifted by the suction contrivance, and led to the conveyor-roll 23. When removing the paper sheet pile from the table 19, the contact bars thereon are lowered and cause by the contact device described (Figs. 4 to 7) the further conveyance of the fresh paper sheets placed on the table plate below.

The paper sheets piles are blown from the front as well as from the rear, and that by means of the existing pump, that is doubleacting. i

What we claim, is

1. In an apparatus for feeding paper sheets, the combination of a suction contrivance comprising a suction-rod, a plurality of endless conveyor ribbons arranged in superposed fashion, roll pairs of different diameters guiding said ribbons and locating them like inclined planes, an endless chain to commonly move said ribbons in such a way that the ribbon parts in contact with one another are equi-directed and of equal speed, andaplurality of table plates, one arranged below the upper part of the upper conveyor ribbon, another one below the upper part of the lower conveyor ribbon, and a third one between the upper part of the upper conveyor ribbon and said suction-rod, saidlatter table plate forming an extension of the first-mentioned table plate.

2. In a construction as specified in claim 1, a driving shaft, cog-wheel sectors keyed thereon, other revolubly mounted cogwhee.l sectors adapted to co1ne in gear with the first-mentioned cog-wheel sectors, crankpins fixed on said revolubly mounted cogwheel sectors, oscillatory driving-levers, connection-rods between the latter and said crank-pins, and links joining said levers with said suction-rod.

3. In a construction as specified in claim 1, a contact device comprising contact bars arranged above the table plate between the upper part of the upper conveyor ribbon and the suction-rod, a ratchet wheel, an axle for the latter, a pawl-lever for said ratchet Wheel influenced by said contact bars, a toothed wheel on said ratchet wheel axle, and a spur wheel on one of the trunnions of said conveyor ribbon rolls in gear with said toothed wheel and adapted to transmit the advance of said ratchet wheel to said conveyor ribbons in a way corresponding to the removal of paper sheets from the apparatus.

In testimony whereof we have hereunto set our hands.

JULIUS GIESECKE. HERMANN GIESECKE. 

